Leaving recursive functions running forever?

Question

I came across a function where it had a setTimeout inside with a timeout growing exponentially (timeout *= 2).

let timeout = 10000
fun         


        

Answer 1

This is not a recursive function call. The call to setTimeout will cause foo to be called by the JavaScript event loop at a later time.

This code will not cause a stack overflow or any such problems. It should be completely safe.

To understand how this works in-depth, I suggest reading up on the JS event loop and microtasks.